I remember that link floating around from October of 2004. Since then, I'd say the best do-it-yourself package for the cheapest is now the redrockmicro guide. It has a parts list and instructions to build your own for $45.
http://redrockmicro.com/p_guide.htm
Having spent time building my own adapter, I must say, I would MUCH rather purchase a pre-built device. As a reminder, here are the main options out there (besides the $10k mini35), none have been qualified with the HVX200 since it's not available yet, but most should be able to work with it.
http://redrockmicro.com
http://www.cinemek.com
http://www.dandiaconu.com
http://www.letus35.com/ - beware, people are having quite a few issues with this adapter, although it's image quality looks pretty nice.
For more info, follow the threads here or on the forums of the sites mentioned above:
http://www.dvinfo.net/conf/forumdisplay.php?f=70
-steev
http://www.holyzoo.com